saying what a great debater mitt romney is. but some say the president should stop lowering speculat i expectations and do a little self reflection. president obama's greatest enemy isn't romney, but himself. because, shall we say, the president is quite confident. here he is at a polling station in henderson, nevada. >> basically they're keeping me indoors all the time. it's a drag. they're making me do my homework. >> he was joking but polls show that most people believe that obama will ace the debate. still, some are concerned about his tendency to appear smug, testy sb y and impatient. remember what this four years ago? >> he's very likable. i agree with that. i don't think i'm that bad. >> you're likable enough. >> thank you so much. >> some felt that comment oozed c condescencion and cost him the primary there. smile, make his points, but being gentile. will president obama beat himself in the debate? facebook.com/carolcnn. your responses, later this hour. >>> one dramatic event can influence the outcome of any election.